Valve construction for compressors and refrigerating pumps



A. STOLL July 2, 1929.

VALVE CONSTRUCTION FOR COMPRESSORS AND REFRIGERATING PUMPS Filed Jan.23, 1928 9.....13 July 2, 1929.,

" UNITED STATES ALBERT STOLL, OF DETROIT, MICHIGAN.

PATENT OFFICE.

vA LvE .consrnucrron ron comranssoas nn anrarenaa'rrne r ms.

Application filed January 2a, 1928. Serial No. 248,861.

"This invention relates to valve assemblies 2 p for compressorsparticularly designed for use in connection with refrigeratingapparatus,

and the invention has as one of its primary objects to provide'a valveassembly of the above character distinguished by its simplicitylofconstruction and operation which not .onlyenhances its value bothmechanically and commercially but provides a design of 1 a strong anddurable nature.

The invention further consists in the eculiar construction ashereinafter set fort In the drawings Figure 1 is a central sectionthrough the 15 compressor in the axial plane of the cylin-- der andpiston; U y

Figure 2 is a section on the line 2-2 of Figure 1; and I Fi re 3 is a,section on the line 3-3 of Figure 1.

1 Referring now more specifically to the drawing, it is to be noted thatthere is illustrated a compressor having a cylinder 11 for thereciprocating piston 12. The cylin 25 der -1-1' is preferablycounterbored as at 13 forming the annular shoulder 14 upon which thevalve seat member 15 is adapted to seat. As shown, this member issleeved within the enlarged portion 13 ofthe cylinder and is providedwith a central opening 16 having a reduced portion 17 terminating in anupwardlyextending annular flange 18 constituting a seat for the exhaustvalve 19. The valve seat member 15 is further provided with an annu- V35 lar groove 20 in the periphery thereof arranged to communicate withthe peripheral groove 21 formed in the cylinder walls. Arranged withinthe cylinder wall opposite the groove 21 and communicating therewith isan inlet passage 22 through which the refrigerant is permitted to enterthe compressor. 'For establishin g communication between the groove 20and the chamber 23, defined by the head of the piston and lower wall ofthe member 15, I provide a series of circumferentially spaced passages24 extending from the groove 20 and opening into the annular recess 25formed in the bottom wall of the member 15 adjacent the reduced portion17 of the'opening 16. For controlling the passage of refrigerant throughthe passages 24 the valve member 26 is provided which as shown is in theform of an annulus having a central opening 27 registering with thereduced opening 17. The body portion of the valve member 26 extendsacross the recess 25 and is anchored at the let ports.

periphery thereof between the shoulder 14 and member 15, the inner edgeof the valve 26 merely engaging the bottom surface of the member 15adjacent to the reduced opening 17 thereof so as to be capable offlexing downwardly to permit the refrigerant to enter the chamber 23from the intake opening 22. The valve member 26 is formed of a resilientmaterial preferably I spring metal, and is slightly dishedso as to beself closing at the end of the suctionstroke.

"For holding the member 15 in position within the counterbored portion13 of the cylinder, and for closing the upper end of the cylinder, Iprovide a second member 28 threadedly engaging an enlarged portion 29 ofthe cylinder and provided with a portion of reduced diameter arranged toengage the member 15 and hold the same against the shoulder 14. Asshown, the member 28 is further provided with a central recess 30 ofsubstantially the same diameter as the open ing 16 and cooperatestherewith to form an outlet valve chamber.

The member 28 like the member 15 is also provided with acircumferentially extending groove 31 arranged to communicate with anannular groove 32 formed in the cylinder wall. Extending radiallyinwardly from the groove 31 and communicating with the outlet valvechamber is a series of passages 33. Thus, from the foregoing it will beapparent. that communication between the outlet valve chamber and theconduit 34 is established by means of the passages 33 and annular groove31 registering with the groove 32 formed in the cylinder wall.

To insure proper seating of the outlet valve member 19, a suitable coilspring 36 is provided. As shown one end of this spring abuts the wall 37of the recess 30 and the opposite end thereof engages the valve member.To prevent the refrigerant from leaking past the member 28 to-theexterior of the compressor, the seals 38 and 39 are provided. The seal38 is disposed in an annular groove 40 formed by chamfering off theperiphery of the'upper and lower faces of the members 15 and 28respectively while the seal 39 is disposed between the shoulder 41formed by the enlarged portion 29 and the lower wall of the member 28.With such anarrangement an effective seal is provided between the inletand out- In order to reduce the clearance in the compression chamber 23to the mlmmum, the pis- I 42 adapted the valve 19 will lift from its tonhead is provided with a raised portion in the upper position of thepiston to project through the aperture 27 in the valve 26 and reducedportion 17 of the opening 16. Y

With the construction as described, the gas to be compressed isintroduced into the grooves 20 and 21 and passages 24 through the inletopening 22 and during each downward stroke of the piston the suctionwill causethe inner edge of'the valve 26 to deflect downwardlypermitting the gas to enter the compression chamber 23. Upon the upwardstroke of the instantaneously close and the gas contained in the chamberwill be compressed against the valve 19 which is held to its seat by thesprin 36. Therefore when the pressure of the g gs against the valve 19excels the pressure exerted'upon the valve 19 by the spring, seat andthe compressed volume within-the cylinder will be quickly transferred tothe outlet valve chamber and through the passages 33 to the systemabove. i r Y What I claim as my invention is: H

1. In a compressor, the combination with a cylinder, of a member sleevedwithin said cylinder having an opening therein and having an annularflange extending inwardly from said openin and a valve member disposedwithin sai opening and seated upon said flange.

2. In a compressor, a cylinder,

the combination, with pressor including a member sleeved within seatsthereon,

said cylinder having vertically spaced valve valve members engageablewith said seats for controlling the flow of fluid theret'hrough and asecond member threadedly engaging said cylinder having a portion onageable ho ding the latterin position.

3. In a compressor the combination with a cylinder having a passagetherethrough for the flow of a fluid,o' a member sleeved within saidcylinder having an opening theret through for the passage of fluid, andmeans for controlling the flow of fluid through said opening includingla second member secured within said cylin er having a recess thereinregistering with the opening aforesaid forming a chamber, said secondmember further having a passage therein establishin communicationbetweenfthe chamber and t e passage formed in the cylinder. y

4. In a compressor the combination with a fivlinder having passagestherethrough for th flow of a flu1d and having spaced annular groovesformed in the side walls thereof, of a member sleeved within saidcylinder having an annular groove therein registering with one of thegrooves aforesaid and form ing therewith an annular" chamber, saidmember also having a. series 'of openings piston the valve 26 willsaidpassages.

of a valve assembly for tlm com-' municate with the with the memberaforesaid for therein establishing communication between said chamberandinterior of the cylinder,

a second member secured within said cylin- .lng spaced grooves formedin" the side walls thereof communicating with the inlet and outletopenings, and members disposed withing said cylinder and cooperatingwith the 'said grooves to form spaced chambers, said members havingpassages therein establishing communication between the said chambersand interior of the cylinder and means for controlling the flow 6. In acompressor, the combination with of refrigerant through a cylinderhaving inlet and outlet openings 1 therein for the passage ofa fluid, ofmeans for controlling the flo\v inlet and outlet openings aforesaidincluding members disposed within said cylinder having annular groovesin the periphery thereof cooperating with the side walls of the cylinderto form vertically spaced annular chambers, said chambers arranged tocominlet and outlet openings aforesaid.

7. In a compressor, the combination with a cylinder having inlet andoutlet openings therein, of means for controlling the flow of fluidthrough the inlet and out et openin s aforesaid including membersdisposed wit in said cylinder having annular grooves in the'peripherythereof registering with the inlet andoutlet openings aforesaid andcooperatingwith the side. walls of the cylinder 0 form spaced chambers,and a member of fluid through the clamped between the'members aforesaidand engageable with the side walls of the cylinder between the saidchambers for effecting a tight-seal'therebetween.

8. In a compressor, the combination with I a cylinder having anoutletpassage therein for the flow of a fluid, of means for controllingthe flow of fluid through said outlet passage including members securedwithin said cylinder having registering recesses communicating with theinterior of said cylinder and constituting an outlet chamber for thefluid, and a valve disposed within said chamber for controlling theentrance of fluid to the latter, said chamber havingmeans estah-.lishing communication between the cylinder and outlet opening aforesaid.I

9. In a compressor, the combination with a civilinder having an outletopening in one wa thereof for the passage of the fluid, of means forcontrolling the flow of fluid through said opening including a membersecured within said cylinder and having a recess therein communicatingwith the said opening and with the interior of the cylinder, and a valvemember arranged within the recess aforesaid for controlling the flow offluid through said opening.

10. In a compressor, the combination with a cylinder having inlet andoutlet openings therein for the passage of a fluid, a member arrangedwithin said cylinder and having means including a groove in theperiphery thereof establishing communication between one of said 0enings and the interior of the cylinder, said member further having arecess therein establishing communication between the interior of thecylinder and the other of said 0 enings, and means associated with saidmember for controlling the flow of fluil through the recess and grooveaforesai 11. In a compressor, the combination of a cylinder having anannular groove formed in the side walls thereof and having a passage forthe flow of a fluid communicating with the groove, a member positionedwithin the cylinder opposite the groove having a central recess thereincommunicating with the cylinder and having a series of passagesestablishing communication between the groove and recess, and valvemeans for controlling the flow of fluid through the said recess.

12. In a compressor, the combination with a cylinder having inlet andoutlet openings therein for the flow of a fluid and having spacedgrooves formed in the side walls thereof communicating with the inletand outlet openings, and means disposed within the said cylinder andcooperating with the grooves to form spaced chambers, said meansestablishing communication between the chambers aforesaid and interiorof the cylinder, and valve means for cont-rolling the flow of fluidthrough the said passages.

13. In a compressor, the combination with a cylinder having inlet andoutlet passages therein for the flow of a fluid, of a member positionedwithin the cylinder having an openin therethrough establishingcommunication etween the inlet and outlet passages aforesaid, an annularflange formed on said member and extending into the opening therein, anda valve member arranged within the said opening and adapted to seat uponthe flange for controlling the flow of fluid through the opening.

14. In a compressor, the combination with a cylinder havlng inlet andoutlet pass es therein for the flow of a fluid, of means isposed withinthe cylinder cooperating with the side walls thereof to form spacedchambers communicating with the passages aforesaid and with the interiorof the cylinder, and valve means for controlling communication betweenthe cylinder and chambers aforesaid.

In testimony whereof I aflix my signature.

ALBERT STOLL.

